science newsletter: Science News SciGuru.com

Τετάρτη 19 Ιουνίου 2013

Science News SciGuru.com

Study reveals new details about H7N9 influenza infections that suddenly appeared in China
Laughing gas does not increase heart attacks
Bullying and Suicide Among Youth Is a Public Health Problem
New Compound Excels at Killing Persistent and Drug-Resistant Tuberculosis
The rhythm of the Arctic summer

Study reveals new details about H7N9 influenza infections that suddenly appeared in China

Posted: 19 Jun 2013 06:54 AM PDT

Researchers with the Network Dynamics and Simulation Science Laboratory at the Virginia Bioinformatics Institute have revealed new information about the latest strain of type A influenza, known as H7N9, in a report in the journal PLOS Currents: Outbreaks.

Laughing gas does not increase heart attacks

Posted: 19 Jun 2013 06:43 AM PDT

Nitrous oxide — best known as laughing gas — is one of the world’s oldest and most widely used anesthetics. Despite its popularity, however, experts have questioned its impact on the risk of a heart attack during surgery or soon afterward. But those fears are unfounded, a new study indicates.

The findings by researchers at Washington University School of Medicine in St. Louis will appear in the July issue of the journal Anesthesiology.

Bullying and Suicide Among Youth Is a Public Health Problem

Posted: 19 Jun 2013 06:39 AM PDT

Recent studies linking bullying and depression, coupled with extensive media coverage of bullying-related suicide among young people, led the Centers for Disease Control and Prevention (CDC) to assemble an expert panel to focus on these issues. This panel synthesized the latest research about the complex relationship between youth involvement in bullying and suicide-related behaviors.

New Compound Excels at Killing Persistent and Drug-Resistant Tuberculosis

Posted: 19 Jun 2013 06:35 AM PDT

An international team led by scientists at The Scripps Research Institute (TSRI), the Howard Hughes Medical Institute and Albert Einstein College of Medicine of Yeshiva University has identified a highly promising new anti-tuberculosis compound that attacks the tuberculosis (TB) bacterium in two different ways.

The rhythm of the Arctic summer

Posted: 19 Jun 2013 05:36 AM PDT

Our internal circadian clock regulates daily life processes and is synchronized by external cues, the so-called Zeitgebers. The main cue is the light-dark cycle, whose strength is largely reduced in extreme habitats such as in the Arctic during the polar summer. Using a radiotelemetry system a team of researchers from the Max Planck Institute for Ornithology have now found, in four bird species in Alaska, different daily activity patterns ranging from strictly rhythmic to completely arrhythmic. These differences are attributed to the species’ mating systems and behaviours.